<template>
  <div>
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>参数列表</el-breadcrumb-item>
    </el-breadcrumb>
    <el-card>
      <el-alert title="注意： 只允许第三级分类设置相关参数" type="warning" :closable="false" show-icon></el-alert>
      <el-row class="card_row">
        <el-col>
          <span class="card_span">选择商品分类</span>
          <el-cascader
            v-model="selectedKeys"
            :options="cateList"
            :props="cateProps"
            @change="handleChange"
          ></el-cascader>
        </el-col>
      </el-row>
      <el-tabs v-model="activeName" @tab-click="handleClick">
        <el-tab-pane label="动态参数" name="many">
          <el-button type="primary" :disabled="isBtnDisable" @click="addDialogVisible = true">添加参数</el-button>
          <el-table :data="manyTableData" border stripe>
            <el-table-column type="expand">
              <template slot-scope="scope">
                <el-tag
                  v-for="(item,i) in scope.row.attr_vals"
                  :key="i"
                  closable
                  @close="handleClose(i,scope.row)"
                >{{item}}</el-tag>
                <el-input
                  class="input-new-tag"
                  v-if="scope.row.inputVisible"
                  v-model="scope.row.inputValue"
                  ref="saveTagInput"
                  size="small"
                  @keyup.enter.native="handleInputConfirm(scope.row)"
                  @blur="handleInputConfirm(scope.row)"
                ></el-input>
                <el-button
                  v-else
                  class="button-new-tag"
                  size="small"
                  @click="showInput(scope.row)"
                >+ New Tag</el-button>
              </template>
            </el-table-column>
            <el-table-column type="index"></el-table-column>
            <el-table-column label="参数名称" prop="attr_name"></el-table-column>
            <el-table-column label="操作">
              <template slot-scope="scope">
                <el-button
                  type="primary"
                  icon="el-icon-edit"
                  @click="showEditDiolog(scope.row.attr_id)"
                >编辑</el-button>
                <el-button
                  type="danger"
                  icon="el-icon-delete"
                  @click="deleteCate(scope.row.attr_id)"
                >删除</el-button>
              </template>
            </el-table-column>
          </el-table>
        </el-tab-pane>
        <el-tab-pane label="静态属性" name="only">
          <el-button type="primary" :disabled="isBtnDisable" @click="addDialogVisible = true">添加属性</el-button>
          <el-table :data="onlyTableData" border stripe>
            <el-table-column type="expand">
              <template slot-scope="scope">
                <el-tag
                  v-for="(item,i) in scope.row.attr_vals"
                  :key="i"
                  closable
                  @close="handleClose(i,scope.row)"
                >{{item}}</el-tag>
                <el-input
                  class="input-new-tag"
                  v-if="scope.row.inputVisible"
                  v-model="scope.row.inputValue"
                  ref="saveTagInput"
                  size="small"
                  @keyup.enter.native="handleInputConfirm(scope.row)"
                  @blur="handleInputConfirm(scope.row)"
                ></el-input>
                <el-button
                  v-else
                  class="button-new-tag"
                  size="small"
                  @click="showInput(scope.row)"
                >+ New Tag</el-button>
              </template>
            </el-table-column>
            <el-table-column type="index"></el-table-column>
            <el-table-column label="参数名称" prop="attr_name"></el-table-column>
            <el-table-column label="操作">
              <template slot-scope="scope">
                <el-button
                  type="primary"
                  icon="el-icon-edit"
                  @click="showEditDiolog(scope.row.attr_id)"
                >编辑</el-button>
                <el-button
                  type="danger"
                  icon="el-icon-delete"
                  @click="deleteCate(scope.row.attr_id)"
                >删除</el-button>
              </template>
            </el-table-column>
          </el-table>
        </el-tab-pane>
      </el-tabs>
    </el-card>
    <el-dialog
      :title="'添加' + textTitle"
      :visible.sync="addDialogVisible"
      width="50%"
      @close="addFormClosed"
    >
      <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px">
        <el-form-item :label="textTitle" prop="attr_name">
          <el-input v-model="addForm.attr_name"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="addDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addParams">确 定</el-button>
      </span>
    </el-dialog>
    <!--编辑-->
    <el-dialog title="提示" :visible.sync="editDialogVisible" width="50%">
      <el-form :model="editForm" :rules="editFormRules" ref="editFormRef" label-width="100px">
        <el-form-item :label="textTitle" prop="attr_name">
          <el-input v-model="editForm.attr_name"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editParams">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data () {
    return {
      cateList: [],
      cateProps: {
        expandTrigger: 'hover',
        value: 'cat_id',
        label: 'cat_name',
        children: 'children'
      },
      selectedKeys: [],
      activeName: 'many',
      manyTableData: [],
      onlyTableData: [],
      addDialogVisible: false,
      addForm: {
        attr_name: ''
      },
      addFormRules: {
        attr_name: [
          { required: true, message: '请输入参数', trigger: 'blur' }
        ]
      },
      editDialogVisible: false,
      editForm: {
        attr_name: ''
      },
      editFormRules: {
        attr_name: [
          { required: true, message: '请输入参数', trigger: 'blur' }
        ]
      },
      inputVisible: false,
      inputValue: ''
    }
  },
  created () {
    this.getCateList()
  },
  methods: {
    async getCateList () {
      const { data: res } = await this.$http.get('categories')
      if (res.meta.status !== 200) {
        return this.$message.error('查询商品列表分类')
      }
      this.cateList = res.data
    },
    async getParamsData () {
      if (this.selectedKeys.length !== 3) {
        this.selectedKeys = []
        this.manyTableData = []
        this.onlyTableData = []
      } else {
        const { data: res } = await this.$http.get(`categories/${this.cateid}/attributes`, {
          params: { sel: this.activeName }
        })
        if (res.meta.status !== 200) {
          return this.$message.error('获取属性参数失败')
        }
        res.data.forEach(item => {
          item.attr_vals = item.attr_vals ? item.attr_vals.split(',') : []
          // console.log(res)
          item.inputVisible = false
          item.inputValue = ''
        })
        if (this.activeName === 'many') {
          this.manyTableData = res.data
        }
        this.onlyTableData = res.data
      }
    },
    handleChange () {
      this.getParamsData()
    },
    handleClick () {
      this.getParamsData()
    },
    addFormClosed () {
      this.$refs.addFormRef.resetFields()
    },
    addParams () {
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) {
          return
        }
        const { data: res } = await this.$http.post(`categories/${this.cateid}/attributes`, {
          attr_name: this.addForm.attr_name,
          attr_sel: this.activeName
        })
        if (res.meta.status !== 201) {
          return this.$message.error('增加参数属性失败')
        }
        this.getParamsData()
        this.addDialogVisible = false
        return this.$message.success('增加参数属性成功')
      })
    },
    async showEditDiolog (id) {
      this.editDialogVisible = true
      const { data: res } = await this.$http.get(`categories/${this.cateid}/attributes/${id}`)
      if (res.meta.status !== 200) {
        return this.$message.error('获取属性失败')
      }
      this.editForm = res.data
    },
    editFormClosed () {
      this.$refs.editFormRef.resetFields()
    },
    async setAtterValue () {
      const { data: res } = await this.$http.put(`categories/${this.cateid}/attributes/${this.editForm.attr_id}`, {
        attr_name: this.editForm.attr_name,
        attr_sel: this.activeName
      })
      if (res.meta.status !== 200) {
        return this.$message.error('更新参数属性失败')
      }
      this.getParamsData()
      this.editDialogVisible = false
      return this.$message.success('更新参数属性成功')
    },
    editParams () {
      this.$refs.editFormRef.validate(async valid => {
        if (!valid) {

        }
      })
    },
    async deleteCate (id) {
      const res = await this.$confirm('此操作将永久删除该属性, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      // console.log(res)
      if (res !== 'confirm') return this.$message.info('已取消删除')
      const { data: red } = await this.$http.delete(`categories/${this.cateid}/attributes/${id}`)
      if (!red) return this.$message.error('删除失败')
      this.$message.success('删除成功')
      this.getParamsData()
    },
    showInput (row) {
      row.inputVisible = true
      this.$nextTick(_ => {
        this.$refs.saveTagInput.$refs.input.focus()
      })
    },
    async saveAttrValuse (row) {
      const { data: res } = await this.$http.put(`categories/${this.cateid}/attributes/${row.attr_id}`, {
        attr_name: row.attr_name,
        attr_sel: row.attr_sel,
        attr_vals: row.attr_vals.join(',')
      })
      if (res.meta.status !== 200) {
        return this.$message.error('更新标签失败')
      }
    },
    handleInputConfirm (row) {
      if (row.inputValue.trim().length === 0) {
        row.inputValue = ''
        row.inputValue = false
        return
      }
      row.attr_vals.push(row.inputValue.trim())
      this.saveAttrValuse(row)
      row.inputVisible = false
      row.inputValue = ''
    },
    handleClose (i, row) {
      row.attr_vals.splice(i, 1)
      this.saveAttrValuse(row)
    }

  },
  computed: {
    // 直接当做普通属性调用不加括号
    // 任何data中数据变化立即重新计算
    // 计算属性会缓存
    //   return 必须retrun结果
    isBtnDisable () {
      if (this.selectedKeys.length !== 3) {
        return true
      }
      return false
    },
    // 当前选中的id
    cateid () {
      if (this.selectedKeys.length === 3) {
        return this.selectedKeys[2]
      }
      return null
    },
    textTitle () {
      if (this.activeName === 'many') {
        return '动态参数'
      }
      return '静态参数'
    }
  }
}
</script>

<style lang="less" scoped>
.card_row{
    margin: 15px 0;
}
.card_span{
    margin: 10px;
}
.el-tag{
    margin: 8px;
}
.input-new-tag{
    width: 120px;
}
</style>
